{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{c}}
\hline\hline
                    &\multicolumn{4}{c}{\specialcell{\;\;\;\;\; Change in source fecal contamination \;\;\;\;\;}}\\\cmidrule(lr){2-5}
                    &\multicolumn{1}{c}{(1)}   &\multicolumn{1}{c}{(2)}   &\multicolumn{1}{c}{(3)}   &\multicolumn{1}{c}{(4)}   \\
\hline
Predicted change    &       0.176***&       0.179** &       0.046   &       0.036   \\
source fecal contamination x treated&     (0.064)   &     (0.073)   &     (0.071)   &     (0.078)   \\
Predicted change    &       5.263***&       5.080***&       6.226***&       6.231***\\
source fecal contamination&     (0.355)   &     (0.404)   &     (0.394)   &     (0.428)   \\
Travel time in      &      -0.023*  &      -0.017   &      -0.012   &      -0.005   \\
minutes, measured   &     (0.013)   &     (0.012)   &     (0.014)   &     (0.013)   \\
Constant            &       0.012   &       0.011***&       0.025** &       0.024***\\
                    &     (0.011)   &     (0.002)   &     (0.011)   &     (0.003)   \\
\hline
Predicted location  &        Desk   &        Desk   &   Algorithm   &   Algorithm   \\
Treatment unit fixed effects&          No   &         Yes   &          No   &         Yes   \\
R$^2$               &        0.20   &        0.28   &        0.22   &        0.30   \\
N                   &        5832   &        5832   &        5832   &        5832   \\
\hline\hline
\end{tabular}
}
